12 Removing noise from the TrawlEye view
The Ping-Ping Filter analyses the historical information from previous consecutive pings in order to remove unwanted noise and interference from the echo presentation.
Context
The following filter options are provided:
•  Off: The filter is disabled. The historical information from previous transmissions ("pings") is not used to remove noise and unwanted echoes.
•  Weak: Select Weak to allow the filter to compare the echoes from the latest two pings. For the current echo to be shown, it must be present in both of these pings.
•  Medium: Choose Medium to compare the echoes from the latest four pings. For the current echo to be shown, it must be present in all of these pings.
•  Strong: This selection allows the filter to compare the echoes from the latest eight pings.
Procedure
1 Open the Active menu.
2 Locate the Ping-Ping Filter.
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3 Choose the required setting.